Hello, after I got an old and unnecessary Redmi, I decided to use it as a second monitor. I installed the SpaceDesk Driver and installed it on the phone. My laptop is a ThinkBook 15 G2 ARE Laptop – Type 20VG. I installed AMD driver and Lenovo drivers on it. I connect on my old redmi but error 2-5 display off. I tried on my Samsung, but the same. I also saved the log according to your instructions, turned on the diagnostics, tried to connect, turned off the diagnostics, saved it. This file will be here. I hope for your help!
Thank you foe sending the diagnostic info.
Based on the logs, you have one of the incompatible software present in your primary machine – splashtop.
You have to uninstall its Virtual driver first before connecting to spacedesk.
Just open the splashtop Wired XDisplay Agent -> Advanced, then uninstall their virtual driver.